Method of feeding reverberatory furnaces.



PATENTEDNOV. 19. 1907.

.A Y H. L. CHARLES. METHOD OPTEEDING RBVERBBRATORY FURNAGES.-

APPLICATION FILED MAB. 26. 1907.

NTOR

By Allomey,

V INVE zwi 6 SHEBTS-SHBLT l,

WITNESS ES:

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METHOD 0F' FEED APBLIOA'TIN FILED MAB.. 26.@907..

WITNESSES:

, '.PATENTBD Nov-.'19, 1907 H. L. CHARLES. A um RBvBRB-ERATORY FURNAGEsPATENTED Nov. 19, 190'?.

'H. L. CHARLES.

METHOD 0F PEEDING RBVERBERATORY- PURNAGBS,

APPLICATION FILED MAR. 26. 1907. y 6 SHEETS-SHEET 8.

ldlll .E

- i acitize t .fmay cou cem` g eitknownthr t l,v HENK): LEWIS C uARLEs,niof tl 1e- 'U nited'States ofAinerica, re siding at Saltlialge City, c`)uutyoi` Salt Lake, 5 a11d..-`tate.of,Utah-,.have invent-ed certainDemand usefullinproveinents i n Methods of ,Feeding Reverboratory.Furnaces,^of `which f the following is aspecilication.'

Myj-inv'ention vrelates to an improvement in niethodof feedingreyerberatory smelting furnaces'andis intende-dto provide a' means-gfgrincijeasing the capacity oi a furnacewitl' '-a savinggoftlabor.andfueland at the saine timeipreserving'thclfurnacerom corrosion. This laccomplishf byan improved method or systeniof ecdiugihe charges into thefur- ;to;the-present tiir'iezithasjhcen the uni'- r "versalvpractice toputan -alnountofcharge intojfit-lfcqiurnace suflicient to "cover the 1heartht over severalinches deep. This is 4dfi-in onechar'ge at or nearthe. center artlifythrouglr large slots -or .drop t ofidedihf thefroofof-the, furnace. he doors tare hen/opened .and the 'chargeofsmeltheforenbther. charge can he rece'iedastheftemperature is "reducedfrom f practiceto tap .out fall o f theJnolten sieg andm'attein?brrlertofettle.the wallson the inffr-fsidejof..he;hearthftrhere corrosion takes "pl/ceQ-.o "inv-:to theY molte-ri.hath'coming in 3 5.E.quired` atjiiitervalsof from :one to ten daysivteriii tfsgsually donc with barren silica- (Si Another great detmnentcaused by a uiiis'that it. allows the .freslriron Fes) to '-1 comeyfin'v contact with the silieain the fbdtt'oin of4 the. h( 'atl" andvcorodvlifte .h',ti'n ie, 'with the result thatin ai fewg motiths'itfis.worn sothin that itmust beA prolonge ,zj-1 .labor "and, material .savedi "t increased ioli-iageohtained :is .the

Speciicaton of Letters Patent. l f j Mam... filedmrch 26. '1907. se inNp. 364.680.

- UNITED STATES PATENT OFFICE;

HENRY LEWIscHARLEs, or sALrLAKE c iTY, UTAH, 'AssreNoR or ONE-.HALF 'roFRITZ i; AUGUSTUS-HEINZE, or BUTTE, MONTANA.

maison or rrnmensvsnsneroxy FURNACES.

Patented Nov. 19, 1907.

ing them' in oftener and at various places over the hearth with thefurnace'l kept atfull )n feeding, leveling, charges and fettling willvbe accomplished and a-savmg of heat,` as'the present largecliargeshrnig the furnace'besults.

rufen-nce to the accompanyingsix sheets lof ically part of' areverberatory fr lrnac'e. The

low the smelting temperature whereas, un-h der niy system, a continuousoperation re'.

My inrention will be best understood by heat all the time, thetonnagewill be com'- pounded several times and a saving of labordrawnigs which fully illustrate my invenfj`v tion, representingmore or-less diagram1nat-. i

llue end, which isofordinaxjy and well known.. f-

construction, has been omitted. i

the. top .of the hearth and center of a furnace,

showing luy invention, particularly the posielevation of' the lower sideof Fig. 1. Fi 3 on the line-.4 4- Fig.1. Figs. 5, 6, 7, &f8`,

pers ont-ofthe furnace bed.

.f-iO-jf is provided With` aj hearth v--11-Y bridge -12-' overwhich-Fass the gases fromthe-lire' box .--13` i sired construction.

'tinuous feeding 1 places, over the hearth-Without interruptin'v thesmelting or reducing the ltemperature.

.or trough *J4-- extending around the e ge of the unace 10-.

through dropping,r very smell charges at fre-- quent intervals, orcontinuously,- at venous Walls und protecttiem trom corrosive 'ac-ftion. -The raw or celclned ores .l pro vose to 'Feed tl'i.1 -ugh aseries of small holes, ocated l This l accomplish in the followingmanner.`

In the drawings Figure lis aplan of f '75 i tion of thetrpugh-likehoppers. Fig. 2-1san is alngitudinal A section taken. on the. 'ne' i3-'.-3. Figi-.Lf Fig. 4 is a. crosssection taken'.

illustrateon an yenlarged scale-my devicswr feedingsinall quantities ofores from the hop- :v

Referring to Figs. l, 2'& 3,1 thefrurnace..

nally escapingfl'roin thellue at theopposite end(not/shown),` part ofthe furnace may be o1 any de-'4 Y '9o My invention .consists ina-praetically conof ores to the furnace f'.

. propose'to -feed .silicious lmaterial or oresl located near the edgeof the hearth, sc that. .l

These ores will fall close-tothe side-walls of the furnace--10 110making a diam. or base sloping towards the i illustrated in Figs. 5, 6,7`& 8. The swinging hearth- 11 'preventing the molten slag, matte, pranyof the sulfide from touching the brick liming thereby vavoidi allcorrosion he raw or caleined ores willbe fed' into the furnace 10 from aseries ofgtransverse hoppers or troughs 15 V'lhis arrangement of thevarious hoppers, -continuous and transverse is clearly .0 illustrated 1nFig. 1 also the openings of the drop pipes 16- through 'which the oresare fed onto the hearth 11 The hoppers 14 ,and 15 and drop pipes 16areshown in elevation in Figs. 2, 3 & 4.

i'5' The operation of feeding the ores onto the hearth of the furnace invarying quantities `asrequired, is as follows: The transverse hoppers15J- are arranged in' pairs, and .between each pair a shaft 17 extends 20 across the furnace -.10-. The shafts 1 7 "hate 'a rocking motiontransmitted'from an eccentric on the head motion 18 and are connectedbya series of levers 19: and links 20. IBythis arrangement-.the shafts17 all lhave the same motion; lhe small :drop holes 3() inthe roof ormain arch 3lof the furnace l0-'are partially covered-by 'fire brickslabs 32' haring P un- ,slid e, back or forth, feeding more or less oresthroughthe openings 33 and holes 30 onto the hearth 11- by means oftherocking motion transmittedthroughthe shafts 17.

'35` The plungers 34 areA provided with rods 35- and stop ins 36-.Suspended from andfkeyed to t ie shafts 17, are arms '37 one for eachfeeder. Connected to arms 3.7 are swinging arms 38 with 410 projections39 at their outer ends.

fhese projections 3Q- have slots 40 and vdro vover the plunger rods 35be- 4tween t e stop pins- 36j 'It is evident that when the projection 39reaches 'either of the stop pins 36ton. the plunger 4rod B5-'any furthermotion will be transmitted to the rod and plunger 34. flhe amount-oftravel ofthe plungers 34-. is regulated byinsertin' or removing fillingpieces 41 'shown on eft hand side of Figs.

6 & 8. When all the 'ieces 41- are in place, the movement o plunger 34will e greatest and as they are removed, the effective movement of theplunger 34- is decreased. 'The ore drops on e'ach side of the plunger34- as it rests on the fire brick slab 32- and the sliding movement ofthe plunger 34, back and forth, shoves the ore oIgl the slab. 32 andinto the furnace 10 .l Brackets 42' are riveted to the drop pipes 16 andsupport the plunger rods 35.

In order to .stop two or three feeding lungers without interrupting anyof the ot ers,

-i the following arrangement is provided and is 66 is attached.

arms 38 are supported by hooks 43- pivoted to dogs 44- which` areattached to a shaft sup orted in the bracket 42. This. shaft is mag twosleeves or pipes 46- 'and 47 Fig. 5. Each of these shafts is capable ofindividual rotation by handles -=48 V on the outside of furnace 10- andhas three'or more dogs 44. attached. By turning down a handle 75 48- theshaft 47 is partially rotated, thus raisingv dogs -44- and hooks 43.The'hooks 43 elevate the swinging arms 38 w ith projections 39 and slots40 clear of the plunger rod 35 and pins -36 80 and all movenientof theplunger --34 ceases. See right hand side of Fig. 5. The abovearrangement could be changed so that' each feeder could be stopped orstarted independently of all the rest, but this would i'e- 85 quire morehandles and pipes. The' si'licious orcs are fed from hoppeis 14 in muchthe same manner, Figs. 7.& 8.

Along each side of the furnace 10-v is a rocking shaft 49- and 50 whichis oper- 90 'ated frointhe eccentricon the head motion 18- as follows:The rocking shaft l7 nearest thel fire. box 13 carries a bevel-v gear50- engaging with abevel gear carries a lever' 54 connected to a' lever55 on shaft 49' by means of a link 56 Thus a rocking motion is conveyedvto shaft -49'. Lever' 55 "link 56 I and lever 57--on shaft, 50, conveythis' 100 rocking'- motion to' shaft 5(1- on oppositeside of furnace 10-Fig. 1. There are hangers 58 keyed to shafts 49 and 50 one for eachfeeder.

`which 5 raised out of contact with theplunger rod 35 and stop pins 36by means of hooks 61 pivoted to dogs 62 =at' .tached to short shaftsS-mounted'vin 110 brackets 64 The shaft 63 carries a counterweight arm65 to which arope This rope passes over a pulley 67 The weighted arm 65-keeps the dogs- G2 in lower'position 115 when feeders 'are in operation,but when' a set are to be stoppe( the rope 66-1- is touch the moltenbath before they become -125 liquid themselves. I have dropped 650'pounds perfsecond byhand for hours atfa time into a furnace todemonstrate my idea,

and have reached acapaeity' of 500 ,tons

smelted .per 24 hours on afur'nace that was 180" e up of a center shaft45- and 70 This shaft also Pivoted-to the p lower end of each hanger 58-isan arii'i 105 ulled downy and hooked over a pin G8- his is plainlyillustrated in Figs.A 7 8518.' In vthis manner a molten bath of 'fromfifty 120 open the weer?? charge with rabbles with a conseing ores intoreverberatory furnaces con-.l

slstlng in dropping the same over the hearth in small charges atfrequent intervals.

. 2. The Within described method of feeding ores into reverberatoryfurnaces consisting in dropping the same over the hearth in smallcharges at frequent intervals and at various places.

3. The Within described method of feeding ore into reverberatoryfurnaces consistingv in dropping the same onto the hearth through a.series ofsmall holes located in the roof of the furnace.

4. The Within described method of feeding ores into reverberatoryfurnaces consisting in feeding raw silicious ores between the calcinedores and the edges of the hearth.

5. The within described method of feeding ores into reverberatoryfurnaces consisting in drop ing raw silicious ores around the edges othe hearth and the calcined ores in small quantities over the/'innerportionof the hearth.-

6. The within described method of feeding ores 4into reverberatoryfurnaces consisting in dropping raw silicions ores onto the hearththrough small holes located in the arch of the hearth near ,the edgesoll the hearth and dropping caleined or roasted ores in small chargesover the inner portion ofA the hearth through arch of hearth.

7. The Within described method of feeding reverberatory furnacesconsist-ing in feeding silica or silicious material for fettlingeonsmall holes located inthe under the present tinuously from a hopperor trough extending I around the edge of the hearth and in feeding theOre 1n small charges over the hearth of the furnace -by any convenientmeans.

8. The within described method of feeding ores into a reverberatoryfurnace, consisting of dropping the same through numerous small openingsin the roof of the furnace in a continuous or intermittent stream, insuch minute quantities that ticles will be molten bath. l

9. The Within described method of feeding ores intoreverberatoryfurnaces, consisting of feeding the same in in one ormore rainlikestreams whereby the ore is smelted immediately Without reducing thefurnace temperature.

1U. The within described method of l'eeding ores into reverberatoryfurnaces, consisting of feeding the same over the hearth in smallquantities and at frequent interwils by any convenient means.

.In testimony whereof, l have signed my name to this specification inthe presence oll two subscribing witnesses, this 5th day ol' March.1907.

ll lCNltY LEWIS (l lA ltlilCH.

Witnesses lMolt Pwr'r, A. lC. l Mum.

tbe individuel parsmelted before reaching the

